This carb. was used on the later model mini's with the 998cc engines and is a great upgrade from the HS4 syle or if you want to improve fuel economy on a 1275. The HIF is a far superior design than the early HS style that uses an internal float, throttle shaft seals, and improved adjusting screws. It will come jetted to fit a 1000cc engine, but can be fitted for any upgraded or 1275cc engine with a different needle. Comes with all new seals,gaskets,needle & seat,and jet tube assembly. All parts are inspected, cleaned, and polished. The air filter to carb elbow will not be inncluded unless you specify in the comment field you need one.